The CDC has less power than you think, and likes it that way
Time - 10/17/2014
The agency traditionally acts in an advisory role and can only take control from local authorities under two circumstances: if local authorities invite them to do so or under the authority outlined in the Insurrection Act in the event of a total breakdown of law and order.
And here the picture becomes murkier yet because authority does not always beget power.
“It’s not a massive regulatory agency,” said Wendy Parmet, a professor in public health law at Northeastern University in Boston. “They don’t have ground troops. They don’t have tons of regulators. They’re scientists. Even if the states asked them to do it it’s not clear how they would do it.”